Screen the heaters, screen the light bulbs, as recommended. By the time the heat penetrates the heavy insulation of a wolf, she or they are burned, as they have no way of extinguishing the heat immediately. Double the meat ration of the bitch at the latest half-way through pregnancy. Use some oatmeal gruel mixed with her meat to keep bowels open and disallow blockage of birth canal by hard fecal matter. Feed her twice a day till cubs are born; then three times till cubs are taken. Use a little reconstituted dry non-fat milk on her food, not a lot, just enough to make the food nice and mushy, not liquefied. Hey now, guys and gals, you are getting it.